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hw/intc/arm_gicv3: Sanity-check num-cpu property

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In the GICv3 code we implicitly rely on there being at least one CPU
and thus at least one redistributor and CPU interface.  Sanity-check
that the property the board code sets is not zero.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220408141550.1271295-3-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2022-04-08 15:15:11 +01:00
parent 2a19903697
commit 89ac9d0cba
1 changed files with 4 additions and 0 deletions
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4
hw/intc/arm_gicv3_common.c
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@ -328,6 +328,10 @@ static void arm_gicv3_common_realize(DeviceState *dev, Error **errp)
s->num_irq, GIC_INTERNAL);
return;
}
if (s->num_cpu == 0) {
error_setg(errp, "num-cpu must be at least 1");
return;
}
/* ITLinesNumber is represented as (N / 32) - 1, so this is an
* implementation imposed restriction, not an architectural one,